<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
	<title>函数返回值</title>
</head>
<body>
    
    <script type="text/javascript">
        function show(a,b){
        	//return 15;    //可以返回是数字  字符串  甚至表达式 
        	//return 'anfsdf';
        	return a+b;

        }

        alert(show(3,5));


    </script>
	
</body>
</html>